text: /**
   * @file print.c
   * @note Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License along
   * with this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   */
  #include <stdarg.h>
  #include <stdio.h>
  #include <syslog.h>
  #include <time.h>
  #include <unistd.h>
  
  #include "print.h"
  
  static int verbose = 0;
  static int print_level = LOG_INFO;
  static int use_syslog = 1;
  static const char *progname;
  
  void print_set_progname(const char *name)
  {
  	progname = name;
  }
  
  void print_set_syslog(int value)
  {
  	use_syslog = value ? 1 : 0;
  }
  
  void print_set_level(int level)
  {
  	print_level = level;
  }
  
  void print_set_verbose(int value)
  {
  	verbose = value ? 1 : 0;
  }
  
  void print(int level, char const *format, ...)
  {
  	struct timespec ts;
  	va_list ap;
  	char buf[1024];
  	FILE *f;
  
  	if (level > print_level)
  		return;
  
  	clock_gettime(CLOCK_MONOTONIC, &ts);
  
  	va_start(ap, format);
  	vsnprintf(buf, sizeof(buf), format, ap);
  	va_end(ap);
  
  	if (verbose) {
  		f = level >= LOG_NOTICE ? stdout : stderr;
  		fprintf(f, "%s[%ld.%03ld]: %s\n",
  			progname ? progname : "",
  			ts.tv_sec, ts.tv_nsec / 1000000, buf);
  		fflush(f);
  	}
  	if (use_syslog) {
  		syslog(level, "[%ld.%03ld] %s",
  		       ts.tv_sec, ts.tv_nsec / 1000000, buf);
  	}
  }
  